Nuclear grade seal oil filter element and hydraulic filter device

Abstract

The application provides a nuclear-grade sealing oil filter element and a hydraulic filter device. The nuclear-grade sealing oil filter element comprises a filter element outer framework and a base. The filter element outer framework has a mounting end. At least one first connecting piece is arranged on the mounting end of the filter element outer framework. At least one second connecting piece is arranged on the base. The filter element outer framework is connected to the base in advance through the clamping between the first connecting piece and the second connecting piece. The nuclear-grade sealing oil filter element has the advantages that the first connecting piece is arranged on the end of the filter element outer framework, the second connecting piece is arranged on the base and is clamped with the first connecting piece, the clamping cooperation between the first connecting piece and the second connecting piece can improve the mounting strength between the filter element outer framework and the base, then the bonding or welding connection mode is further adopted to make the mounting between the filter element outer framework and the base more firm, and the structural strength of the nuclear-grade sealing oil filter element is improved.

Description

Technical Field

[0001] This invention relates to the field of hydraulic filtration technology, specifically to a nuclear-grade sealing oil filter element and a hydraulic filtration device. Background Technology

[0002] Hydraulic filtration systems have wide applications in industrial fields, especially in the nuclear energy sector, where they are a critical component. In hydraulic filtration systems, oil filtration is extremely important because impurities and particulate matter in the oil can damage critical components such as hydraulic pumps and valves.

[0003] To ensure the normal operation of the hydraulic system, high-efficiency filters are required to filter the oil. However, although existing hydraulic oil filter elements have a certain filtering effect, due to the increased working conditions, the increased flow rate of the existing filter elements and the increased viscosity of the filter medium, the connection of the outer shell is easily squeezed and cracked, resulting in pipeline leakage, filter element disintegration, and inability to effectively filter impurities.

[0004] Moreover, due to the insufficient processing precision of the existing outer frame and base, the axes of the outer frame and base are not on the same straight line during the filter element manufacturing process, resulting in uneven stress on the filter element as a whole, which makes it impossible to achieve the required structural strength and thus makes the filter element more prone to disintegration.

[0005] Based on this, the inventors of this application propose a nuclear-grade sealing oil filter element and a hydraulic filtration device. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defect of easy disintegration of filter elements in the prior art, and to provide a nuclear-grade sealing oil filter element and a hydraulic filtration device.

[0007] The present invention solves the above-mentioned technical problems through the following technical solution:

[0008] This invention provides a nuclear-grade sealed oil filter element, characterized in that it comprises:

[0009] The filter element outer frame has an installation end, and the filter element outer frame is provided with at least one first connector at the installation end;

[0010] The base is provided with at least one second connector, and the filter element outer frame is pre-connected to the base by snapping between the first connector and the second connector.

[0011] According to one embodiment of the present invention, the first connector is a snap-fit ​​tooth, and a plurality of the snap-fit ​​teeth are arranged to extend inward around the outer peripheral boundary of the mounting end;

[0012] The second connector is a snap-fit ​​groove that is adapted to the snap-fit ​​teeth. When the snap-fit ​​teeth and the snap-fit ​​groove are engaged, the base and the filter element outer frame are coaxial.

[0013] According to one embodiment of the present invention, the first connector is a snap-fit ​​groove, and a plurality of snap-fit ​​grooves are provided to extend inward around the outer peripheral boundary of the mounting end;

[0014] The second connector is a snap-fit ​​tooth that is adapted to the snap-fit ​​groove.

[0015] According to one embodiment of the present invention, the snap-fit ​​teeth include a connecting end and an extending end, the connecting end being connected to the filter element outer frame, and the extending end extending in an arc shape toward the middle of the filter element outer frame;

[0016] The snap-fit ​​groove extends in an arc toward the center of the base.

[0017] According to one embodiment of the present invention, the arcuate orientation of the plurality of said snap-fit ​​teeth is arranged along the same helical direction.

[0018] According to one embodiment of the present invention, the cross-sectional dimensions of the connecting end to the extending end of the snap-fit ​​tooth decrease.

[0019] According to one embodiment of the present invention, the connecting end of the snap-fit ​​tooth is consistent with the outer edge contour of the filter element outer skeleton.

[0020] According to one embodiment of the present invention, the filter element outer frame is bonded to the base, and the adhesive fills at least into the installation gap between the first connector and the second connector.

[0021] According to one embodiment of the present invention, the filter element outer frame and the base cooperate to form a mounting surface, and the filter element outer frame and the base are welded at the mounting surface.

[0022] The present invention also provides a hydraulic filtration device, characterized by the nuclear-grade sealed oil filter element as described above.

[0023] The positive and progressive effects of this invention are as follows:

[0024] The nuclear-grade sealing oil filter element of the present invention has a first connector at the end of the filter element outer skeleton and a second connector on the base that engages with the first connector. The engagement of the first connector and the second connector can improve the installation strength between the filter element outer skeleton and the base. Further bonding or welding can make the installation between the filter element outer skeleton and the base even more secure, thereby improving the structural strength of the nuclear-grade sealing oil filter element.

[0025] During the engagement of the snap-fit ​​teeth and snap-fit ​​grooves, the base and the filter element outer frame are always in a coaxial state. This engagement of the snap-fit ​​teeth and snap-fit ​​grooves helps to improve the fit between the filter element outer frame and the base, ensuring that the two circular shafts are on the same straight line. This increases the error tolerance of the workers and makes it easier for them to quickly install the filter element outer frame and the base. Attached Figure Description

[0026] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein:

[0027] Figure 1 A schematic diagram of the split structure of the nuclear-grade sealed oil filter element of this invention;

[0028] Figure 2 for Figure 1 The bottom view of the filter element's outer frame shown;

[0029] Figure 3 for Figure 1 The top view of the base shown.

[0030] 10. Filter element outer frame; 110. Mounting end; 120. First connector; 121. Connecting end; 122. Extension end;

[0031] 20. Base; 210. Second connector; 220. Mounting surface. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Embodiments of the invention will now be described in detail with reference to the accompanying drawings. Preferred embodiments of the invention will now be described in detail, examples of which are illustrated in the drawings. Wherever possible, the same reference numerals will be used in all the drawings to denote the same or similar parts. Furthermore, although the terminology used herein is selected from commonly known and used terminology, some terms mentioned in this specification may have been chosen by the applicant at his or her discretion, and their detailed meanings are explained in the relevant sections of the description herein. Moreover, the invention should be understood not only by the actual terms used, but also by the meaning implied by each term.

[0034] Please refer to Figures 1 to 3This invention proposes a nuclear-grade sealing oil filter element, which includes a filter element outer frame 10 and a base 20. The filter element outer frame 10 has an installation end 110 and at least one first connector 120 is provided at the installation end 110. The base 20 is provided with at least one second connector 210. The filter element outer frame 10 is pre-connected to the base 20 by snapping together with the first connector 120 and the second connector 210.

[0035] Traditionally, the filter element outer frame 10 and the base 20 are connected only by welding or bonding. Under this connection method, the bottom outer shell of the filter element outer frame 10 is easily subjected to pressure and rupture due to increased flow or increased viscosity of the filter medium, which leads to leakage in the pipeline, disintegration of the filter element, and inability to effectively filter impurities.

[0036] Therefore, this application provides at least one first connector 120 at the mounting end 110 of the filter element outer skeleton 10, and then provides a second connector 210 on the base 20 that is adapted to and snapped into the first connector 120. The connection strength between the filter element outer skeleton 10 and the base 20 is improved by the snap-fit ​​cooperation of the first connector 120 and the second connector 210. Furthermore, the structural strength of the nuclear-grade sealing oil filter element is greatly improved by combining bonding or welding and other connection methods.

[0037] In one embodiment, the first connector 120 is a snap-fit ​​tooth, with multiple snap-fit ​​teeth extending inward around the outer peripheral boundary of the mounting end 110. Correspondingly, the second connector 210 is a snap-fit ​​groove adapted to the snap-fit ​​teeth.

[0038] It should be noted that when the filter element's operating flow rate increases or the viscosity of the filter medium increases, the outer edge of the bottom end of the filter element's outer skeleton 10 is most susceptible to compression and breakage. Therefore, by surrounding the outer periphery of the mounting end 110 with snap-fit ​​teeth, the installation strength between the outer periphery of the filter element's outer skeleton 10 and the base 20 can be improved.

[0039] In another embodiment, the first connector 120 is a snap-fit ​​groove, and multiple snap-fit ​​grooves extend inward around the outer peripheral boundary of the mounting end 110. The second connector 210 is a snap-fit ​​tooth that is adapted to the snap-fit ​​groove.

[0040] That is, the snap-fit ​​teeth can be set on the filter element outer frame 10 or on the base 20. It is preferable to set the snap-fit ​​teeth on the filter element outer frame 10. If the snap-fit ​​groove is set on the filter element outer frame 10, the mounting end 110 of the filter element outer frame 10 needs to be thickened, which increases the processing difficulty of the filter element outer frame 10.

[0041] In one embodiment, the snap-fit ​​teeth include a connecting end 121 and an extending end 122. The connecting end 121 is connected to the filter element outer frame 10, and the extending end 122 extends arcuately toward the middle of the filter element outer frame 10. The snap-fit ​​groove extends arcuately toward the middle of the base 20.

[0042] The snap-fit ​​teeth and the outer frame 10 of the filter element are integrally machined.

[0043] The extension end 122 of the snap-fit ​​teeth extends obliquely towards the middle of the filter element outer frame 10 relative to the connecting end 121, and the extension end 122 is spaced apart from the mounting end 110 of the filter element outer frame 10. Correspondingly, the snap-fit ​​groove also extends obliquely towards the middle of the base 20 to match the snap-fit ​​teeth. Thus, when the base 20 and the filter element outer frame 10 are screwed together, the snap-fit ​​teeth will be completely embedded in the snap-fit ​​groove to pre-connect the base 20 and the filter element outer frame 10. Then, the base 20 and the filter element outer frame 10 are further connected by bonding or welding.

[0044] Specifically, the arcuate orientation of multiple snap-fit ​​teeth is set along the same helical direction.

[0045] In other words, the installation between the filter element outer frame 10 and the base 20 is achieved by rotation, which is simple and ensures the connection strength.

[0046] In some other embodiments, the first connector 120 and the second connector 210 may also use other types of mating. For example, snap-fit ​​and slot, threaded rotational mating, etc., are not limited here.

[0047] Specifically, the cross-sectional dimensions of the snap-fit ​​teeth decrease from the connecting end 121 to the extension end 122. Since the connecting end 121 is connected to the mounting end 110 of the filter element outer frame 10, setting the cross-sectional dimension of the connecting end 121 to be larger than that of the extension end 122 helps to improve the structural strength of the snap-fit ​​teeth themselves and avoids tooth breakage during the connection process between the filter element outer frame 10 and the base 20, which would affect the connection strength.

[0048] In one embodiment, the connecting end 121 of the snap-fit ​​teeth is aligned with the outer edge contour of the filter element outer frame 10.

[0049] The diameter of the base 20 is the same as the diameter of the filter element outer frame 10. The snap-fit ​​teeth are extended to the outer edge of the filter element outer frame 10 to prevent the edge of the filter element outer frame 10 from breaking and to improve the connection strength between the filter element outer frame 10 and the base 20.

[0050] Furthermore, the extended ends 122 of the snap-fit ​​teeth connect to form a circle, the center of which is collinear with the center of the base 20 and the filter element outer frame 10. Therefore, after the snap-fit ​​teeth and snap-fit ​​grooves are installed, the filter element outer frame 10 and the base 20 are automatically aligned, improving the tolerance for errors in worker processing, promoting more uniform stress distribution on the nuclear-grade sealing oil filter element, and enhancing the installation strength between the filter element outer frame 10 and the base 20.

[0051] In one embodiment, the filter element outer frame 10 is bonded to the base 20, and the adhesive fills at least into the installation gap between the first connector 120 and the second connector 210.

[0052] In another embodiment, the filter element outer frame 10 and the base 20 cooperate to form a mounting surface 220, and the filter element outer frame 10 and the base 20 are welded at the mounting surface 220.

[0053] Specifically, the process of bonding the filter element outer frame 10 and the base 20 with adhesive is as follows:

[0054] Clean the mounting end 110 and the snap-fit ​​groove of the filter element outer frame 10 to keep its surface clean;

[0055] Inject the glue into the snap-fit ​​groove until the glue overflows to the edge of the base 20;

[0056] Align each snap-fit ​​tooth with the snap-fit ​​groove and rotate the snap-fit ​​tooth to its maximum angle so that the extension end 122 of the snap-fit ​​tooth is fully embedded in the bottom of the snap-fit ​​groove. At this time, the base 20 and the filter element outer frame 10 are automatically aligned.

[0057] Apply vertical pressure to the filter element outer frame 10, and place the installed filter element outer frame 10 and base 20 in the air to stand still;

[0058] Once the glue has completely solidified, the splicing between the filter element outer frame 10 and the base 20 is complete.

[0059] Specifically, the welding process between the filter element outer frame 10 and the base 20 is as follows:

[0060] Align each snap-fit ​​tooth with the snap-fit ​​slot, and ensure that each snap-fit ​​tooth is at least partially embedded in the snap-fit ​​slot.

[0061] Rotate the filter element outer frame 10 to its maximum angle so that the extension end 122 of the snap-fit ​​teeth is fully embedded into the bottom of the snap-fit ​​groove;

[0062] The base 20 is heated by electricity until it reaches a plastic state that can be pressure welded, and then heat-fused with the snap-fit ​​teeth and the edge of the filter element outer frame 10.

[0063] Stop heating and place the connected filter element outer frame 10 and base 20 in the air to cool, completing the splicing.

[0064] This application uses specific terms to describe embodiments of the application. Terms such as "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0065] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, fall within the protection scope defined by the claims of the present invention.

Claims

1. A nuclear-grade sealed oil filter element, characterized in that, include: The filter element outer frame has an installation end, and the filter element outer frame is provided with at least one first connector at the installation end; The base is provided with at least one second connector, and the filter element outer frame is pre-connected to the base by snapping between the first connector and the second connector; The first connector is a snap-fit ​​tooth, and a plurality of the snap-fit ​​teeth are arranged to extend inward around the outer peripheral boundary of the mounting end; The second connector is a snap-fit ​​groove that is adapted to the snap-fit ​​teeth. When the snap-fit ​​teeth and the snap-fit ​​groove are engaged, the base and the filter element outer frame are coaxial. The snap-fit ​​teeth include a connecting end and an extending end. The connecting end is connected to the filter element outer frame, and the extending end extends in an arc shape toward the middle of the filter element outer frame. The snap-fit ​​groove extends in an arc towards the center of the base; The arcuate orientation of the plurality of said snap-fit ​​teeth is arranged along the same helical direction; The filter element outer frame mates with the base to form a mounting surface, and the filter element outer frame and the base are welded at the mounting surface; or, the filter element outer frame is bonded to the base, and the adhesive fills at least into the mounting gap between the first connector and the second connector.

2. The nuclear-grade sealed oil filter element according to claim 1, characterized in that, The first connector is a snap-fit ​​groove, and a plurality of snap-fit ​​grooves are arranged to extend inward around the outer peripheral boundary of the mounting end; The second connector is a snap-fit ​​tooth that is adapted to the snap-fit ​​groove.

3. The nuclear-grade sealed oil filter element according to claim 1, characterized in that, The cross-sectional dimensions of the snap-fit ​​teeth decrease from the connecting end to the extending end.

4. The nuclear-grade sealed oil filter element according to claim 1, characterized in that, The connecting end of the snap-fit ​​tooth is consistent with the outer edge contour of the filter element outer skeleton.

5. A hydraulic filtration device, characterized in that, include: The nuclear-grade sealed oil filter element as described in any one of claims 1-4.

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